Electromagnetic thread trimming noise reduction mechanism and sewing machine thereof

Abstract

The utility model relates to sewing machine equipment, and discloses an electromagnetic trimming noise reduction mechanism and a sewing machine thereof, the electromagnetic trimming noise reduction mechanism comprises an electromagnet (11) installed on a base (10), a trimming driving shaft (12) and a trimming crank (13), the trimming driving shaft (12) penetrates through the trimming crank (13) to be connected with the electromagnet (11), one end of the trimming driving shaft (12) is sleeved with a first elastic element (14), and the other end of the trimming driving shaft (12) is sleeved with a second elastic element (14). The first elastic element (14) is arranged between the thread trimming crank (13) and the electromagnet (11); and a buffer pad (15) is fixed at the end part of the tangent driving shaft (12) and is in contact connection with an ejector rod of the electromagnet (11). The output force of an electromagnet is too large, electric control parameters are not easy to adjust, loud sound is generated when the electromagnet pushes a tangent driving shaft, and the using effect is affected. The first elastic element and the buffer pad are installed at the end of the thread cutting driving shaft on the mechanism, so that the sound generated when the electromagnet ejector rod impacts the thread cutting driving shaft is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine equipment especially relates to a kind of electromagnetic thread cutting noise reduction mechanism and sewing machine thereof. BACKGROUND

[0002] The thread cutting mechanism of sewing machine is basically that electromagnet pushes thread cutting drive shaft and thread cutting crank to move, so that thread cutting crank moves to the position of thread cutting drive cam of lower shaft, thread cutting drive cam rotates and drives thread cutting crank to rotate, thread cutting crank drives scissors assembly to move, realizes thread cutting function, for example, the public number CN219861888U.This structure will produce larger impact sound when the top rod of electromagnet impacts thread cutting drive shaft, and use feeling will be influenced to a certain extent. SUMMARY

[0003] The utility model provides a kind of electromagnetic thread cutting noise reduction mechanism and sewing machine thereof in view of the shortcomings in the prior art.

[0004] To solve the above technical problems, the utility model solves by the following technical schemes:

[0005] A kind of electromagnetic thread cutting noise reduction mechanism, including electromagnet installed on base, thread cutting drive shaft and thread cutting crank, thread cutting drive shaft passes through thread cutting crank and is connected with electromagnet, first elastic element is sleeved on the one end of thread cutting drive shaft, and first elastic element is located between thread cutting crank and electromagnet;Thread cutting drive shaft is fixed with buffer pad at end portion, and buffer pad is connected with the top rod of electromagnet.

[0006] As preferred, rubber pad is sleeved on the one end of thread cutting drive shaft, and rubber pad is located between first elastic element and thread cutting crank.

[0007] As preferred, clamping spring and gasket are installed on thread cutting drive shaft, clamping spring and gasket are located between thread cutting crank and rubber pad, and clamping spring limits gasket on rubber pad.

[0008] As preferred, the central axis of buffer pad is collinear with the central axis of thread cutting drive shaft, and the outer diameter of buffer pad is less than the outer diameter of thread cutting drive shaft.

[0009] As preferred, end cover and second elastic element are sleeved on the other end of thread cutting drive shaft, and second elastic element is located between end cover and thread cutting drive shaft.

[0010] Sewing machine, including base and electromagnetic thread cutting noise reduction mechanism.

[0011] The utility model has remarkable technical effects by adopting the above technical scheme:

[0012] The electromagnetic iron output force is too large, the electric control parameter is not good to adjust, the electromagnetic iron pushes the tangent driving shaft and a larger sound is produced, the use effect is influenced. The first elastic element and the buffer pad are installed on the end of the tangent driving shaft of the mechanism, the sound of the electromagnetic iron ejector rod impacting the tangent driving shaft is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structure schematic view of the electromagnetic wire shearing noise reduction mechanism.

[0014] Figure 2 is Figure 1 a structure schematic view of the tangent driving shaft in the mechanism.

[0015] Figure 3 is a structure schematic view of the electromagnetic wire shearing noise reduction mechanism installed on the base.

[0016] Figure 4 is a partial enlarged schematic view of A.

[0017] The part names referred to by the numbers in the above drawings are as follows:

[0018] 10 - base, 11 - electromagnetic iron, 12 - tangent driving shaft, 13 - wire shearing crank, 14 - first elastic element, 15 - buffer pad, 16 - rubber pad, 17 - snap spring, 18 - gasket, 19 - end cover, 20 - second elastic element. DETAILED DESCRIPTION

[0019] The utility model will be described in further detail in combination with the drawings and examples. Figures 1-4

[0020] Example 1

[0021] An electromagnetic wire shearing noise reduction mechanism, comprising an electromagnetic iron 11, a tangent driving shaft 12 and a wire shearing crank 13 installed on a base 10, the tangent driving shaft 12 passes through the wire shearing crank 13 and is connected with the electromagnetic iron 11, a first elastic element 14 is sleeved on one end of the tangent driving shaft 12, the first elastic element 14 is a spring, and the first elastic element 14 is arranged between the wire shearing crank 13 and the electromagnetic iron 11. A buffer pad 15 is fixed on the end of the tangent driving shaft 12, the buffer pad 15 is made of rubber and is fixed on the tangent driving shaft 12 in an embedded manner, and the buffer pad 15 is in contact connection with the ejector rod of the electromagnetic iron 11. The electromagnetic iron 11 output force is too large, the electric control parameter is not good to adjust, the electromagnetic iron 11 pushes the tangent driving shaft 12 and a larger sound is produced, the use effect is influenced. The first elastic element 14 and the buffer pad 15 are installed on the end of the tangent driving shaft 12 of the mechanism, the sound of the electromagnetic iron 11 ejector rod impacting the tangent driving shaft 12 is greatly reduced.

[0022] ​The tangent driving shaft 12 is sleeved with a rubber pad 16 at one end, the rubber pad 16 is arranged between the first elastic element 14 and the thread cutting crank 13, and the rubber pad 16 is used for limiting the movement stroke of the tangent driving shaft 12.

[0023] The central axis of the buffer pad 15 is collinear with the central axis of the tangent driving shaft 12, the outer diameter of the buffer pad 15 is smaller than the outer diameter of the tangent driving shaft 12, and when the electromagnet 11 hits the buffer pad 15, the buffer pad 15 is deformed, and the deformed buffer pad 15 is still on the end surface of the tangent driving shaft 12, so as to avoid cutting after the buffer pad 15 is deformed.

[0024] The tangent driving shaft 12 is sleeved with an end cover 19 and a second elastic element 20 at the other end, the second elastic element 20 is a spring, the second elastic element 20 is arranged between the end cover 19 and the tangent driving shaft 12, and the end cover 19 is used for positioning the second elastic element 20.

[0025] Embodiment 2

[0026] Embodiment 2 is basically the same as embodiment 1, except that the tangent driving shaft 12 is provided with a snap spring 17 and a gasket 18, the snap spring 17 and the gasket 18 are made of metal, the snap spring 17 and the gasket 18 are made of iron sheet in this embodiment, the snap spring 17 and the gasket 18 are arranged between the thread cutting crank 13 and the rubber pad 16, and the snap spring 17 limits the gasket 18 on the rubber pad 16.

[0027] Embodiment 3

[0028] The sewing machine comprises a base 10, a thread cutting driving cam, a thread cutting assembly and the electromagnetic thread cutting noise reduction mechanism in embodiment 1 or 2, the thread cutting driving cam is installed on a lower shaft, the lower shaft rotates and drives the thread cutting driving cam to rotate, and the thread cutting assembly is installed on the thread cutting crank 13.

[0029] In work, the electromagnet 11 drives the tangent driving shaft 12 and the thread cutting crank 13 to move to the position of the thread cutting driving cam together, the thread cutting driving cam rotates and drives the thread cutting crank 13, the thread cutting crank 13 rotates and drives the thread cutting assembly to move, so as to realize the thread cutting function.

Claims

1. An electromagnetic wire cutting noise reduction mechanism, comprising an electromagnet (11) mounted on a base (10), a wire cutting driving shaft (12) and a wire cutting crank (13), the wire cutting driving shaft (12) being connected with the electromagnet (11) through the wire cutting crank (13), characterized in that: The tangent driving shaft (12) is sleeved with a first elastic element (14) at one end, and the first elastic element (14) is arranged between the tangent cutting crank (13) and the electromagnet (11); and the end of the tangent driving shaft (12) is fixed with a buffer pad (15), and the buffer pad (15) is in contact connection with the top rod of the electromagnet (11).

2. The electromagnetic shearing line noise reduction mechanism according to claim 1, characterized in that: The tangent driving shaft (12) is sleeved with a rubber pad (16) at one end, and the rubber pad (16) is arranged between the first elastic element (14) and the tangent cutting crank (13).

3. The electromagnetic shearing line noise reduction mechanism of claim 2, wherein: The tangent driving shaft (12) is provided with a clamping spring (17) and a gasket (18), and the clamping spring (17) and the gasket (18) are arranged between the tangent cutting crank (13) and the rubber pad (16), and the clamping spring (17) limits the gasket (18) on the rubber pad (16).

4. The electromagnetic shearing line noise reduction mechanism of claim 1, wherein: The central axis of the buffer pad (15) is collinear with the central axis of the tangent driving shaft (12), and the outer diameter of the buffer pad (15) is smaller than the outer diameter of the tangent driving shaft (12).

5. The electromagnetic shearing line noise reduction mechanism of claim 1, wherein: The other end of the tangent driving shaft (12) is sleeved with an end cover (19) and a second elastic element (20), and the second elastic element (20) is arranged between the end cover (19) and the tangent driving shaft (12).

6. Sewing machine comprising a base (10), characterized in that: Also comprising the electromagnetic tangent cutting noise reduction mechanism of any one of claims 1-5. Also comprising the electromagnetic tangent cutting noise reduction mechanism of any one of claims 1-5.

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